Add 54/21 and 8/20
1st number: 2 12/21, 2nd number: 8/20
54/21 + 8/20 is 104/35.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 21 and 20 is 420
Next, find the equivalent fraction of both fractional numbers with denominator 420 - For the 1st fraction, since 21 × 20 = 420,
54/21 = 54 × 20/21 × 20 = 1080/420 - Likewise, for the 2nd fraction, since 20 × 21 = 420,
8/20 = 8 × 21/20 × 21 = 168/420 - Add the two like fractions:
1080/420 + 168/420 = 1080 + 168/420 = 1248/420 - 1248/420 simplified gives 104/35
- So, 54/21 + 8/20 = 104/35
In mixed form: 234/35
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 54/21+16/20 54/42+8/20 54/21+8/40 54/21+24/20 54/63+8/20 54/21+8/60 54/21+40/20 54/21+56/20